# alibaba/xquic

XQUIC Library released by Alibaba is a cross-platform implementation of QUIC and HTTP/3 protocol.

Repository: https://github.com/alibaba/xquic
Canonical: https://ross.abutalabs.com/products/xquic
Homepage: https://doc.xquic.org.cn/
Language: C
License: Apache-2.0
License Family: permissive
Topics: quic, http3, tls13, protocol, ietf
Last push: 2026-08-26T11:29:05+00:00

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 85, longevity 100
- inputs: {"age_days": 1762, "days_push": 7, "days_rel": 22, "gap_med": 56.0, "n_releases_24m": 9}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1915, forks 402 (observed 2026-08-28T04:05:53.716362+00:00)

## What it is
XQUIC is Alibaba's cross-platform C library implementing the IETF QUIC and HTTP/3 protocols for both client and server use. It supports QUIC v1 and draft-29, HTTP/3 with QPACK, pluggable congestion control (NewReno, Cubic, BBR, BBRv2), multipath QUIC, FEC, and QUIC-LB, with TLS integration via BoringSSL or BabaSSL.

## Use cases
- implement an http/3 server in c
- add quic transport to a mobile app
- build a quic client with 0-rtt connection setup
- experiment with multipath quic and fec
- integrate bbr congestion control into a custom transport
- test quic interoperability against other implementations

## When to choose
- you need a production-tested QUIC/HTTP-3 library in C for servers or mobile clients
- you need multipath QUIC, FEC, or QUIC-LB features not yet standardized
- you need broad platform support including Android, iOS, HarmonyOS, Linux, macOS, and Windows
- you want pluggable congestion control and TLS backends

## When to avoid
- you want a higher-level language binding or an off-the-shelf HTTP client application
- your project only needs HTTP/1.1 or HTTP/2 over TCP
- you prefer a Rust or Go QUIC stack with memory safety guarantees

## Facets
- artifact type: library
- maturity: active
- function: http-server, http-client, networking, security, cryptography
- domain: networking, web-development, performance, developer-tools
- platform: windows, cross-platform, cpp
- tags: quic, http3, tls13, multipath-quic, qpack, 0-rtt, congestion-control, ietf, c-library, linux, macos, android, ios

## Member repositories
- alibaba/xquic (main) score 94

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:53.716362+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:10:19.017519+00:00, confidence not recorded.
  - readme: https://github.com/alibaba/xquic (fetched 2026-08-28T04:05:53.716362+00:00, sha 830e16697f28)
  - homepage: https://doc.xquic.org.cn/ (fetched 2026-08-29T10:49:46.107699+00:00, sha bf14a9b4cfda)
  - site_page: https://doc.xquic.org.cn/en/tutorials/what_is_xquic.html (fetched 2026-08-29T10:49:46.116792+00:00, sha c74526ae3d97)
  - site_page: https://doc.xquic.org.cn/markdown/Files/xquic_8h.html (fetched 2026-08-29T10:49:46.118785+00:00, sha cda705ae4697)
- Data as of 2026-08-30T08:39:29.467469+00:00.